Buttondownfcn gui軸

Question

我有一個Gui，它有一個軸...在軸上我可以用繪圖繪制線..但是我想選擇一個軸線..我嘗試了buttondownfcn ..但是它不起作用。我有一個按鈕DELETE，它的回調是：

hold all;
set(handles.axes6, 'HitTest', 'off');
set(handles.axes6,'ButtonDownFcn',('h = copyobj(gcbo,figure)'));
delete_object_axes = findobj(h, 'Type', 'line');

我的代碼是：

% --- Executes on mouse press over axes background.
function axes6_ButtonDownFcn(~, ~, handles)
% hObject    handle to axes6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
hold all;
set(handles.axes6, 'HitTest', 'off');
set(handles.axes6, 'ButtonDownFcn', {@Delete_Callback, handles}');


% --- Executes on mouse press over figure background, over a disabled or
% --- inactive control, or over an axes background.
function figure1_WindowButtonDownFcn(~, ~, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
hold all;enter code here
global h;
set(handles.axes6, 'HitTest', 'off');
h = findobj(handles.axes6, 'Type', 'line');
set(h, 'ButtonDownFcn', {@Delete_Callback});

幫幫我..我如何選擇和刪除行？？？ 或移動？？？ 有某種方法可以做到嗎？？？ 對我來說很重要..請！ 幫我！：）

Answer 1

以下是基於MATLABcentral中的討論的示例代碼，可以幫助您實現所需的目標 。 如果單擊某行，它所做的就是checl，如果您單擊了它，它將對其進行修改，如果再次單擊該行，它將被刪除。 您可以將其粘貼到文件中並運行。

function init()
    close all; clear variables; clc;
    ax1=ezplot('sin(x)');
    set(ax1,'ButtonDownFcn',@mouseClick);
end

function mouseClick(source, event)
    if strcmp(get(source,'Type'),'line')
        if get(source,'linewidth')==2
            delete(source);
            return
        end
        %// Store the handle "source" someplace

        %// Demonstration modification:
        set(source,'linewidth',2);
    end
end

編輯 ：這是一個更復雜的示例，顯示了如何將變量保存到handles結構（即guidata ）：

function init()
    close all; clear variables; clc;
    hLine(1) = ezplot('sin(x)'); hold all; hLine(2) = ezplot('cos(x)');
    set(hLine(:),'ButtonDownFcn',@mouseClick);
    grid on
end

function mouseClick(hObject, eventdata)

 handles = guidata(gcf); %#1

 try
     if handles.delete_object_axes==hObject;
         delete(hObject);
         handles = rmfield(handles,'delete_object_axes');
     else
         set(handles.delete_object_axes,'linewidth',1);
         set(hObject,'linewidth',2);
         handles.delete_object_axes = hObject;
     end     
 catch
     if strcmp(get(hObject,'Type'),'line')
        handles.delete_object_axes = hObject;
        set(hObject,'linewidth',2);
        guidata(gca, handles);
     else
        set(handles.delete_object_axes,'linewidth',1);
     end
     return;
 end

 guidata(gca, handles);

end